If g(x) = 2x + 7, what is g(a+1) in terms of a?

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Multiple Choice

If g(x) = 2x + 7, what is g(a+1) in terms of a?

Explanation:
Substituting the input into a linear function shows how the output changes when the input is shifted. For g(x) = 2x + 7, plug in x = a+1: g(a+1) = 2(a+1) + 7. Distribute the 2 to get 2a + 2, then add 7 to obtain 2a + 9. So the expression in terms of a is 2a + 9.

Substituting the input into a linear function shows how the output changes when the input is shifted. For g(x) = 2x + 7, plug in x = a+1: g(a+1) = 2(a+1) + 7. Distribute the 2 to get 2a + 2, then add 7 to obtain 2a + 9. So the expression in terms of a is 2a + 9.

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